Annunciator.



No. 811,083. PATENTED JAN. so, 1906.

H. M. OLSEN ANNUNGIATOR;

APPLICATION FILED MAYIB, 1901.

MTWZE'EM mv g Fifi V flair/or 7W @Msem a resident of Chicago, Cook county,

re srn'rns Parana: oron.

HALVOR M. OLSEN, OF CHICAGO, lLLINOIS, ASSIGNOR TO AMERICAN ELECTRIC TELEPHONE COMPANY, OF CHICAGO, ILLINOIS, A CCR- POR-ATION OF NET/V JERSEY.

ANNUNCIATOR.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed May 16, 1901- Serial No. 60,792.

To all whom it may concern:

Be it known that I, HALVOR M. OLSEN, a citizen of the United States of America, and Illinois, have invented a certain. new and useful Improvement in Annunciators, of which the following is a specification.

My invention relates to improvements in annunciators generally, and has special reference to those in which a long or relatively great movement or throw of the signal-indieating device is required and in which but a small movement of the armature of the operating-magnet is obtainable or desirable.

It has for its objects the provision in annunciators of the class described of simple apparatus in which but a slight movement of the armature is required to fully throw and. expose the sign al-indicator, of a construction permitting the use of metals of good wearing qualities where. needed, and one in which but slight magnetic power is required for its operation, whereby a cheap, efficient, and durable device is obtained and one that is ineX- pensive to maintain and operate.

To the accomplishment of hese and such other objectsas may hereinafter appear the invention consists in an annunciator having a magnet secured on one side of a support with a longitudinal armature carrying an arm adapted to operate a pivoted signal indicator or target on the other side the support, the signal indicator or target consisting of a segmental portion fulcrumed at the center of its curve with a rearwardly-extcnding portion adapted to be acted upon by the armature through its arm. A segmental cover is supplied for the targets, having suitable apertures through which the targets are exposed.

The invention further consists in the parts and combinations hereinafter fully described, and particularly pointed out in the claims, reference being had to the accompanying drawings, forming a part of this specification, in which the same reference-figures designate like parts throughout the several views, and. in which Figure 1. is a plan view of my improved annunciator. Fig. 2 is a side elevation of the same. Fig. 3 is a front end elevation. Fig. 4 is a perspective view of a segmental target.

Fig. 5 is a perspective view of the front seg in the rear block 11.

normally raises the armature mental plate, and Fig. 6 is a perspective detail view of the target-operating arm.

In the figures, 2 and 3 are supportingplates for the magnet and target and are properly spacerv apart by the blocks or thimbles 1, which are secured between the two plates by screws or in any desired manner. At the rear of the plate 2 a metal block 5 is placed to better secure the end piece 6 of the electromagnet to the support, an end piece 7, similar to the end piece 6, being provided for the other end of the magnet, both of which snugly fit the core 8 thereof passing ccntrally through the coil 9. These end pieces serve to extend the magnetic circuit to their upper edges, where the armature 10 is lo cated, and tends to close the same when. the coil is energized. Insulating-blocks 1] and. 12 are placed at the two ends of the magnetcoil in the usual way, the terminals 13, connected with the magnetroil, being located The armature 10 is provided with a downwardly-extending portion 1.4, through which an adjusting-screw 15 passes to prevent too great movement of the same. Both the horizontal and vertical portions of the armature are cut away centrally to lighten the construction. It is pivoted at its rear end on the pivot-plate 14H, having the rearwardly-eXtending pivot-arms 14 said plate being secured in any desired manner to the end piece 7 of the magnet.

Side strips and 21 are secured to the insulating-blocks 11 and 12 and have rearwardly-extending portions 22, to which circuit-wires are adapted to be connected. The strip 20 is provided with an integral stationary contact 23, while the strip 21. has rigidly secured thereto the springstrip 25, which.

1.0, an insulating-block 26 being interposed, and has a transversely-extending arm 27, adapted to cooperate with. the stationary contact 23 to close an electric circuit therethrough, the said portion 27 of the spring being given a downward bend, so as to close the circuit between these two contactsin the initial move ment of the armature.

At the front end of the armature an arm 30 (best seen in Fig. 6) is secured in any desired manner thereto and projects forward over the plates 2 and 5, which are suitably notched at 2 to allow the said arm. to vibrate ciator.

therein and has a downwardly extending portion 31 between the plates 2 and 3 and close to the plate 2, provided with a foot or lug 32, which bears upon a rivet or spindle 33, mounted in the arms 34 of the segmental or arc-shaped target 35. This target comprises a segmental surface plate 35*, the side pieces 34 and the arms or levers 34, all being stamped and pressed from a single piece of metal and may therefore be of as light material as desired. It is pivoted upon a pin 36, extending through apertures 37 in its arms 34 and the journals or supports 38, secured to the inside of the front plate 3. The rivet, and of course the foot 32 of the arm 30, carried by the armature, may be of hard metal, which wears much better than where the arm bears directly upon a flap or shutter, as in some constructions, since such flap or shutter is usually of soft light material. Again,

cations may be made therein and not depart from the spirit or scope thereof- The invention is defined in the following claims:

1. An annunciator comprising an electromagnet, a frame secured to the forward end of said magnet, a target pivoted upon said frame, a convex cover secured to the forward end of the frame in front of the target, said cover being provided with an opening adapted to expose the face of the target, the curvature of the cover corresponding to the are described by the' forward end or face of the target, and an armature arranged to raise the forward end of the target.

2. An annunciator comprising an electromagnet, a convexcap secured to the forward end of the magnet structure and provided with an opening, the pivoted target having a I convex face adapted to swing in close proxthis arrangement admits of a comparatively imity to the curved inner surface of said cap, long leverage in operating the target and at and an armature for actuating said target. the same time obtains sufiicient movement 3. In an annunciator, a supporting-plate thereof, all of which results in an easily-operhaving an aperture therein, a target having ated and satisfactory annunciator. an arc-shapedface and a rearwardly-extend- The lower part of the segmental face of the ing arm or arms projecting through said aptarget is provided with a number or indicaerture, and pivoted on said support, an arction corresponding to that of the annun shaped covering for said target having an ap- I/Vhen installed, the target projects erture or window through which the target through suitable apertures in the plate 3 and may be displayed, a magnet and armature in beyond the front face, and to prevent methe rear of said supporting-plate, connections chanical injury thereto and cause the indicabetween the said armature and extended tartion to be more distinctive it is covered by get-arms to operate the target. the semicylindrical arc-shaped or segmental 4. In an annunciator, a supporting-plate sheet-metal covering 40, as shown in Figs. 1 having an aperture therein, an arc-shaped and 2, and which is provided with an opentarget having rearwardly extending arms ing or window 41, through which the numeral projecting through said aperture, and pivoton the target is adapted to be displayed when ed on said plate, a covering over the same the armature and target are operated. The similar in form to the target and having an outer surface of the segmental covering 40 is opening therefor, a rivet or pin between the preferably colored black, in which case the ends of the target-arms, a magnet in the rear upper part of the segmental target would be of said supporting-plate, an armature therealso colored black, so that under normal conor, an arm carried by said armature and ditions the opening in the covering 40 would adapted to act upon the rivet or pin and the not attract attention. It will be seen that target-arms to operate the same. this covering is practically in the nature of a 5. In an annunciator, two supportingconvex cap secured to the forward end of the plates spaced apart, the front plate having an annunciator structure. Ina single annunaperture therein, a target having a segmental ciator this covering is inclosed by the end face and rearwardly-extending arms, said pieces 42, formed integrally therewith and arms being pivoted to said apertured plate at having the outwardly turned flanges 43, the center of the curve of the face and exthrough which screws may be passed to setending beyond the pivot and having a pin cure the same to the front plate 3. The de therethrough, a magnet secured to the rear vice, however, may handily be arranged to face of the other supporting-plate, a longituaccommodate a strip of several side by side dinal armature therefor, an arm affixed to by merely extending the plates 2 and 3 and said armature and extending down between the segmental covering-strip 40, such conthe said plates, said arm having a foot porstruction being indicated in dotted lines in tion adapted to bear upon said pin to operate Figs. 1, 3, and 5. the target upon the operation of the magnet From the above matter it will be obvious and armature. that a simple, cheap, efficient, and durable 6. The combination of a convex cap proannunciator is produced, one that is easily inspected or repaired, and one that is convenient to install or replace.

Various changes, alterations, and modifiranged back of said cap, the indicating end of said target being normally depressed, an electromagnet arranged back of said target,

vided with an opening, a pivoted target ar- I emcee and an armature extending lengthwise above the magnet and provided with an arm adapted to engage the rear end of said target, the armature when attracted operating to raise the forward end of the target.

7. The combination of an electromagnet, two plates separated by four short members and rigidly connected with the forward end of the magnet, a convex cap secured to the outer of said plates and provided with an opening, a pivoted target arranged back of said cap, and an armature having a forwardly-extending arm adapted to engage said target.

8. An annunciator, comprising a magnetic core having a relatively flat polepiece disposed in the plane of one end and having its other end extended, an armature provided with a rear vertical portion suitably mounted on the extended rear end of the core and having its horizontal portion overlying the pole-v piece, a finger on the forward end of the armature, a spring tending normally to keep the armature raised, and a target hung on the forward end of the magnet structure and held in a normally lowered position, said target aving a rearwardly-extending projection underlying the said linger, whereby said target is raised when the armature is attracted.

9. An annunciator comprising a magnetic core having a relatively flat pole-piece disposed in the plane of one end, an armature provided with a rear vertical portion suitably mounted at the other end of the magnet and having its horizontal portion overlying the polepiece, the forward end of said armature being provided with a finger, a target hung from the forward end of the magnet structure, and a spring-switch tending normally to keep the armature raised, said target being normally down and having a rear projection underlying the said finger, whereby the target is raised when the armature is attracted.

10. An annunciator, comprising an electromagnet, pieces of insulation secured to the opposite ends of said magnet, pole-pieces also secured to the opposite ends of said magnet, an armature mounted upon the rear end of the magnet structure and having its horizontal portion overlying both pole-pieces, paring device operated by allel terminal strips rigidly secured to said pieces ofinsulation at opposite sides of the magnet, a shutter carried by the forward end of the magnet structure and operated by said armature, and switch-contacts carried by said terminal strips beneath the armature and operated by the latter.

11. An annunciator comprising an electromagnet, pieces of insulation secured to opposite ends of said magnet, an armature suitably mounted upon the rear end of the magnet structure and having its horizontal portion overlying the magnet, a shutter engaged and operated by the forward end of the armature, terminal strips secured to said pieces of insulation at opposite sides of the mag net, and switch-contacts carried by the said terminal strips beneath the armature and opened and closed by the latter. 7

12. In a signaling device, the combination with a magnet having a coil, insulating-supports at each end of the coil, a core therefor, end pieces aflixed to said core, an armature extending longitudinally of the coil and cooperating with the end pieces, electrical contacts carried by said insulating-supports, one of said contacts being of spring material to return the armature to normal position, means to close the said contacts in the initial movement of the armature, and the signal-indieatsaid armature in its forward movements.

13. In an annunciator, the combination with a magnet of a core and end pieces therefor, insulating-blocks between the end pieces and the coil, longitudinal strips secured to said insulating-pieces, stationary contact on one strip, a spring-contact on the other strip and adapted to cooperate with the stationary contact, an armature extending longitudinally of the coil pivoted at one end and adapted to be retracted by said spring-contact, and a signaling device operated by said armature.

Signed by me at Chicago, Cook county, Illinois, this 27th day of March, 1901.

HALVOR M. OLSEN. 

